Gridded bathymetry from EM710 multibeam echosounder of RV HEINCKE cruise HE387 (Svalbard continental margin)

• Main Authors: dos Santos Ferreira, Christian, Wintersteller, Paul, Schmager, Marten
• Format: Dataset
• Language: English
• Published: PANGAEA 2019
• Subjects: Arctic; Bathymetry; Center for Marine Environmental Sciences; CT; EM710; File format; File name; File size; HE387; HE387-track; Heincke; hydroacoustics; MARUM; North Greenland Sea; ROV; Svalbard; Underway cruise track measurements; Uniform resource locator/link to file; Greenland; Kongsberg; Greenland Sea; North Greenland
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.905599; https://doi.org/10.1594/PANGAEA.905599

Between 20.08.2012 and 16.09.2012, bathymetric data was acquired in the Arctic west of Svalbard during the cruise HE387 on board R/V HEINCKE, which was aimed at the investigation of gas emissions at the Svalbard continental margin. The main objectives of the cruise were the quantification of the amount of methane that is released as gas bubbles from the seafloor, mapping the distribution of gas emissions and identifying the source of the gas. By utilizing the multibeam echosounder (MBES) KONGSBERG EM710, a bathymetric map of the working area was conducted and water column data was examined for the detection of gas emission sites, providing the basis for their correlation with seafloor morphologies. Furthermore, additional echosounders (SES2000 & EK60) collected subbottom and water column information. Direct, visual and acoustic measurements on the seafloor were conducted through the remotely operated vehicle (ROV) Cherokee (MARUM) to locate and quantify individual gas emission sites and estimate their flux into the ocean. Pore water samples and measurements of dissolved methane in the water column were obtained from hydrocasts and sediment sampling. CI Citation: Paul Wintersteller ([e-mail]) as responsible party for bathymetry raw data ingest and approval. Description of the data source: During the HE387 cruise, the hull-mounted KONGSBERG EM710 multibeam ecosounder (MBES) was utilized to perform bathymetric mapping. According to the manufacturer, its maximum depth limit is at 2000 m; however, its optimum performance is obtained in shallow to mid water depths of maximum 1000 m. The EM710 operates at sonar frequencies of 70 to 100 kHz. 256 beams (and up to 800 soundings with equidistant and dual swath mode) are formed for each ping with a 1°(Tx)/2°(Rx) footprint. The seafloor is detected using amplitude and phase information for each beam sounding. For further information consult: https://epic.awi.de/id/eprint/33252/1/RV_Heincke_Multibeam_Support.pdf. The position and depth of the water column ...